CN107204173A - A kind of image element circuit and its driving method, display panel - Google Patents
A kind of image element circuit and its driving method, display panel Download PDFInfo
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- CN107204173A CN107204173A CN201710428659.0A CN201710428659A CN107204173A CN 107204173 A CN107204173 A CN 107204173A CN 201710428659 A CN201710428659 A CN 201710428659A CN 107204173 A CN107204173 A CN 107204173A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0238—Improving the black level
Abstract
The present invention provides a kind of image element circuit and its driving method, display panel, is related to display technology field.For solving the problem of image element circuit possibly can not read the threshold voltage of driving transistor.The circuit includes：Node control unit, driver element, display unit, threshold compensation unit and reset unit；Node control unit is used for the voltage output of reference voltage end to first node, or by the voltage output at data voltage end to first node；Driver element is used for output driving current；Display unit is used to show GTG；Threshold compensation unit is used for the difference by voltage and the threshold voltage sum of driver element that the voltage-regulation of Section Point is the first level terminal and by the voltage that the voltage-regulation of Section Point is the first level terminal, the threshold voltage of driver element and the voltage of reference voltage end and with the voltage at data voltage end；Reset unit is used to reset Section Point and display unit.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of image element circuit and its driving method, display panel.
Background technology
Low temperature polycrystalline silicon (English name：Low Temperature Poly Silicon, English abbreviation：LTPS) it is substrate
ORGANIC ELECTROLUMINESCENCE DISPLAYS (the English name of making：Organic Light-Emitting Diode, referred to as：OLED) panel because
It is irregular for LTPS crystal grains, so needing to carry out pixel compensation to each pixel in OLED, so as to eliminate each driving
Thin film transistor (TFT) (English name：Driving Thin Film Transistor, English abbreviation：DTFT) LTPS crystal on raceway groove
Particle is uneven, the problem of each pixel intensity is uneven caused by entering.
However, with the raising of OLED display panel resolution ratio, the threshold voltage for sharing the DTFT of each pixel is read
Time constantly shortens.For example：When the resolution ratio of display panel is that 1440*2560, frequency are 60HZ, the DTFT of each pixel threshold
Threshold voltage read access time is 1s/60HZ/2560=5.6us.In addition.Rising, the fall time of waveform are removed, each pixel
DTFT threshold value read access time is less than 5us, and resolution ratio is higher, and the DTFT of each pixel threshold voltage read access time is got over
It is short.Because the threshold voltage read access time for the DTFT for sharing each pixel constantly shortens, it is possible that cause image element circuit without
Method reads DTFT threshold voltage, and then causes display picture uneven, the phenomenon for water ripples (mura) occur.
The content of the invention
Embodiments of the invention provide a kind of image element circuit and its driving method, display panel, for solving image element circuit
The problem of possibly threshold voltage of driving transistor can not being read.To reach above-mentioned purpose, embodiments of the invention are using as follows
Technical scheme：
First aspect there is provided a kind of image element circuit, including：Node control unit, driver element, display unit, threshold value are mended
Repay unit and reset unit；
The node control unit connects the first scanning end, the second scanning end, the 3rd scanning end, reference voltage end, data
Voltage end and first node, for inciting somebody to action described under the control of the voltage of first scanning end or the voltage of the second scanning end
The voltage output of reference voltage end is to the first node, or by the number under the control of voltage in the 3rd scanning end
According to the voltage output of voltage end to the first node；
The input of the driver element connects the first level terminal, and the control end of the driver element connects Section Point,
The driver element be used for first level terminal voltage and the Section Point voltage control under in the driving
The output end output driving current of unit；
The display unit connection second electrical level end, second scanning end, the reset unit and the driving list
The output end of member, for showing GTG by driving current driving under the control of the voltage of second scanning end；
The threshold compensation unit connect the first node, the output end of the driver element, the 3rd scanning end,
4th scanning end and Section Point, the control for voltage or the voltage of the 4th scanning end in the 3rd scanning end
The lower voltage-regulation by the Section Point is threshold voltage sum of the voltage with the driver element of the first level terminal, and
The first node voltage and the driver element output end voltage control under by the voltage of the Section Point
It is adjusted to the sum of the voltage of the voltage, the threshold voltage of the driver element and the reference voltage end of first level terminal
With the difference of the voltage at the data voltage end；
The reset unit connection resetting voltage end, first scanning end, the 3rd scanning end, the Section Point
And the display unit, for the voltage pair under the control of the voltage of first scanning end by the resetting voltage end
The Section Point resetted and the control of voltage in the 3rd scanning end under by the electricity at the resetting voltage end
Pressure resets to the display unit.
Optionally, the node control unit includes：The first transistor, second transistor and third transistor；
First pole of the first transistor connects the reference voltage end, the second pole connection institute of the first transistor
First node is stated, the grid of the first transistor connects first scanning end；
First pole of the second transistor connects the reference voltage end, the second pole connection institute of the second transistor
First node is stated, the grid of the second transistor connects second scanning end；
First pole of the third transistor connects the data voltage end, the second pole connection institute of the third transistor
First node is stated, the grid of the third transistor connects the 3rd scanning end.
Optionally, the threshold compensation unit includes：4th transistor, the 5th transistor and the first electric capacity；
First pole of the 4th transistor connects the output end of the driver element, the second pole of the 4th transistor
The Section Point is connected, the grid of the 4th transistor connects the 3rd scanning end；
First pole of the 5th transistor connects the output end of the driver element, the second pole of the 5th transistor
The Section Point is connected, the grid of the 5th transistor connects the 4th scanning end；
First pole of first electric capacity connects the first node, the second pole connection described second of first electric capacity
Node.
Optionally, the 4th transistor and the 5th transistor common-source, drain electrode and active layer；
The grid of 4th transistor and the grid of the 5th transistor are located at the both sides of the active layer respectively.
Optionally, the grid of the 4th transistor and the grid of the 5th transistor with the active layer Vertical Square
Upward projection is overlapped.
Optionally, it is additionally provided with the first insulating barrier between the grid and the active layer of the 5th transistor；Described
The second insulating barrier is additionally provided between the grid of four transistors and the active layer；The grid and source electrode of 4th transistor,
The 3rd insulating barrier is additionally provided between drain electrode；The source electrode, drain electrode pass through through second insulating barrier and the 3rd insulation
The through hole of layer is contacted with the active layer.
Optionally, the first pole and the second pole of first electric capacity are brilliant with the grid of the 4th transistor and the 5th respectively
The grid of body pipe to be formed by being made with a patterning processes.
Optionally, the reset unit includes：6th transistor and the 7th transistor；
First pole of the 6th transistor connects the resetting voltage end, the second pole connection institute of the 6th transistor
Section Point is stated, the grid of the 6th transistor connects first scanning end；
First pole of the 7th transistor connects the resetting voltage end, the second pole connection institute of the 7th transistor
Display unit is stated, the grid of the 7th transistor connects the 3rd scanning end.
Optionally, the driver element is driving transistor, and the input of the driver element is the source of driving transistor
Pole, the control end of the driver element is the grid of driving transistor, and the output end of the driver element is driving transistor
Drain electrode.
Optionally, the display unit includes：8th transistor and light emitting diode；
First pole of the 8th body pipe connects the output end of the driver element, and the second pole of the 8th transistor connects
The anode of the light emitting diode is connect, the grid of the 8th transistor connects second scanning end；
The negative electrode of the light emitting diode connects the second electrical level end.
Optionally, the output signal of the 3rd scanning end is the defeated of n-th grade of shifting deposit unit in shift register circuit
Go out signal；The output signal of 4th scanning end is the output signal of (n+1)th grade of shifting deposit unit in shift register circuit；
N is positive integer.
Optionally, the transistor is N-type transistor, or the transistor is P-type transistor.
Second aspect is there is provided a kind of driving method of image element circuit, for driving the pixel described in any one of first aspect
Circuit, methods described includes：
First stage, the node control unit is under the control of the voltage of first scanning end by the reference voltage
The voltage output at end is to the first node；The reset unit is under the control of the voltage of first scanning end by described
The voltage at resetting voltage end resets to the Section Point；
Second stage, the node control unit is under the control of the voltage of the 3rd scanning end by the data voltage
The voltage output at end is to the first node；The threshold compensation unit is under the control of the voltage of the 3rd scanning end by institute
It is the voltage of the first level terminal and the threshold voltage sum of the driver element to state the voltage-regulation of Section Point；The reset mould
Block is answered the display unit under the control of the voltage of the 3rd scanning end by the voltage at the resetting voltage end
Position；
Phase III, the threshold compensation unit is under the control of the voltage of the 4th scanning end by the Section Point
Voltage-regulation for voltage and the driver element of the first level terminal threshold voltage sum；
Fourth stage, the node control unit is under the control of the voltage of second scanning end by the reference voltage
The voltage output at end is to the first node；Voltage and the driver element of the threshold compensation unit in the first node
Output end voltage control under by the voltage-regulation of the Section Point be the voltage of first level terminal, the driving
Voltage and with the voltage at the data voltage end the difference of the threshold voltage of unit and the reference voltage end；The driving
Unit first level terminal voltage and the Section Point voltage control under the driver element output end
Output driving current；The display unit is driven aobvious under the control of the voltage of second scanning end by the driving current
Show GTG.
There is provided a kind of display panel, including above-mentioned image element circuit for the third aspect.
Image element circuit provided in an embodiment of the present invention includes：Node control unit, threshold compensation unit, reset unit, drive
Moving cell and display unit；Due to threshold compensation unit can the 3rd scanning end voltage or the voltage of the 4th scanning end
It is the voltage of the first level terminal and the threshold voltage sum of driver element, the i.e. present invention to control down the voltage-regulation of Section Point
The image element circuit that embodiment is provided can read driver element in the 3rd level terminal or the 4th level terminal input useful signal
Threshold voltage, therefore embodiments of the invention can increase the time span that plain circuit reads the threshold voltage of driver element, enter
And solve the problem of image element circuit can not read the threshold voltage of driver element.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of image element circuit provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram of image element circuit provided in an embodiment of the present invention；
Fig. 3 is the step flow chart of the driving method of image element circuit provided in an embodiment of the present invention；
Fig. 4 is the signal sequence state diagram of image element circuit provided in an embodiment of the present invention；
Fig. 5 is one of schematic diagram of fourth, fifth transistor provided in an embodiment of the present invention；
Fig. 6 is the two of the schematic diagram of fourth, fifth transistor provided in an embodiment of the present invention；
Fig. 7 is the step flow chart of the manufacture method of image element circuit provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The transistor used in all embodiments of the invention can be thin film transistor (TFT) or FET or other characteristics
Identical device, the transistor used according to effect embodiments of the invention in circuit mainly include switching transistor,
Driving transistor.Because the source electrode of the switching transistor that uses here, drain electrode are symmetrical, so its source electrode, drain electrode are can be with
Exchange.In embodiments of the present invention, to distinguish the two poles of the earth of transistor in addition to grid, wherein source electrode will be referred to as in a pole, it is another
Pole is referred to as drain electrode.Provide that the intermediate ends of transistor are that grid, signal input part are source electrode, signal output part by the form in accompanying drawing
For drain electrode.In addition the switching transistor that the embodiment of the present invention is used includes p-type switching transistor and N-type switching transistor two
Kind, wherein, p-type switching transistor is turned on when grid is low level, is ended when grid is high level, N-type switching transistor
To be turned on when grid is high level, end when grid is low level；Driving transistor includes p-type and N-type, and wherein p-type is driven
Dynamic transistor is more than in grid voltage for low level (grid voltage is less than source voltage), and the absolute value of the pressure difference of gate-source
Magnifying state or saturation state are in during threshold voltage；Wherein the grid voltage of N-type driving transistor is high level (grid voltage
More than source voltage), and the pressure difference of gate-source absolute value be more than threshold voltage when be in magnifying state or saturation state.
It should also be noted that, the technical scheme for the ease of clearly describing the embodiment of the present invention, in the implementation of the present invention
In example, employ the printed words such as " first ", " second " and function and the essentially identical identical entry of effect or similar item are made a distinction, this
Art personnel are appreciated that the printed words such as " first ", " second " are not to be defined to quantity and execution order.
Embodiments of the invention provide a kind of image element circuit, specifically, shown in reference picture 1, the pixel single channel includes：Node
Control unit 11, driver element 12, display unit 13, threshold compensation unit 14 and reset unit 15.
Wherein, node control unit 11 connect the first scanning end S1, the second scanning end S2, the 3rd scanning end S3, with reference to electricity
Pressure side Vref, data voltage end Vdata and first node N1, for the voltage in the first scanning end S1 or the second scanning end S2
Voltage control under by reference voltage end Vref voltage output to first node N1, or in the 3rd scanning end S3 voltage
Control under by data voltage end Vdata voltage output to first node N1.
Input I the first level terminals of connection of driver element 12, the control end Q connection Section Point N2 of driver element 12,
Driver element 12 is for the output under the control of the first level terminal V1 voltage and Section Point N2 voltage in driver element
Hold O output driving currents.
Display unit 13 connects the defeated of second electrical level end V2, the second scanning end S2, reset unit 15 and driver element 12
Go out to hold O, for showing GTG by driving current driving under the control of the second scanning end S2 voltage.
The connection first node of threshold compensation unit 14 N1, the output end O of driver element 12, the 3rd scanning end S3, the 4th sweep
Retouch end S4 and Section Point N2, under the control of the 3rd scanning end S3 voltage or the 4th scanning end S4 voltage by the
Two node N2 voltage-regulation is the first level terminal V1 voltage and the threshold voltage sum of driver element 12, and in first segment
Under control of point N1 voltage and the output end O of driver element 12 voltage by Section Point N2 voltage-regulation be the first level
Hold the voltage of V1 voltage, the threshold voltage of driver element 12 and reference voltage end Vref and with data voltage end Vdata
Voltage difference.
The connection of reset unit 15 resetting voltage end Vinit, the first scanning end S1, the 3rd scanning end S3, Section Point N2 with
And display unit 13, under the control of the first scanning end S1 voltage by resetting voltage end Vinit voltage to second
Node N2 resetted and the control of voltage in the 3rd scanning end S3 under by resetting voltage end Vinit voltage to display
Unit 13 is resetted.
Image element circuit provided in an embodiment of the present invention includes：Node control unit, threshold compensation unit, reset unit, drive
Moving cell and display unit；Due to threshold compensation unit can the 3rd scanning end voltage or the voltage of the 4th scanning end
It is the voltage of the first level terminal and the threshold voltage sum of driver element, the i.e. present invention to control down the voltage-regulation of Section Point
The image element circuit that embodiment is provided can read driver element in the 3rd level terminal or the 4th level terminal input useful signal
Threshold voltage, therefore embodiments of the invention can increase the time span that plain circuit reads the threshold voltage of driver element, enter
And solve the problem of image element circuit can not read the threshold voltage of driver element.
Further, embodiments of the invention additionally provide a kind of particular circuit configurations of image element circuit shown in above-mentioned Fig. 1.
Specifically, shown in reference picture 2, node control unit 11 includes：The first transistor T1, second transistor T2 and third transistor
T3。
The first transistor the T1 connection of the first pole reference voltage end Vref, the first transistor T1 the second pole connection first segment
Point N1, the first transistor T1 grid connect the first scanning end S1.
Second transistor the T2 connection of the first pole reference voltage end Vref, second transistor T2 the second pole connection first segment
Point N1, second transistor T2 grid connect the second scanning end S2.
Third transistor T3 the first pole connection data voltage end Vdata, third transistor T3 the second pole connection first
Node N1, third transistor T3 grid connect the 3rd scanning end S3.
Threshold compensation unit 14 includes：4th transistor T4, the 5th transistor T5 and the first electric capacity C1.
4th transistor T4 the first pole connects the output end O of driver element 12, the 4th transistor T4 the second pole connection
Section Point N2, the 4th transistor T4 grid connect the 3rd scanning end S3.
5th transistor T5 the first pole connects the output end O of driver element 12, the 5th transistor T5 the second pole connection
Section Point N2, the 5th transistor T5 grid connect the 4th scanning end S4.
First electric capacity C1 the first pole connection first node N1, the first electric capacity C1 the second pole connection Section Point C2.
Reset unit 15 includes：6th transistor T6 and the 7th transistor T7；
6th transistor T6 the first pole connection resetting voltage end Vinit, the 6th transistor T6 the second pole connection second
Node N2, the 6th transistor T6 grid connect the first scanning end S1.
7th transistor T7 the first pole connection resetting voltage end Vinit, the 7th transistor T7 the second pole connection display
Unit 13, the 7th transistor T7 grid connects the 3rd scanning end S3.
Driver element 12 is driving transistor DTFT, and the input I of driver element 12 is driving transistor DTFT source electrode,
The control end Q of driver element 12 is driving transistor DTFT grid, and the output end O of driver element 12 is driving transistor DTFT
Drain electrode.
Display unit 13 includes：8th transistor T8 and light emitting diode D1；
8th body pipe T8 the first pole connects the output end O of driver element 12, the 8th transistor T8 the second pole connection hair
Optical diode D1 anode, the 8th transistor T8 grid connects the second scanning end S2.
Light emitting diode D1 negative electrode connection second electrical level end V2.
Embodiments of the invention additionally provide a kind of driving method of above-mentioned image element circuit, specifically, shown in reference picture 3,
This method comprises the following steps：
S31, first stage, node control unit is under the control of the voltage of the first scanning end by the voltage of reference voltage end
Export to first node；Reset unit is under the control of the voltage of the first scanning end by the voltage at the resetting voltage end to institute
Section Point is stated to be resetted.
S32, second stage, node control unit is under the control of the voltage of the 3rd scanning end by the voltage at data voltage end
Export to the first node；Threshold compensation unit is under the control of the voltage of the 3rd scanning end by the voltage-regulation of Section Point
The threshold voltage sum of voltage and driver element for the first level terminal；Reseting module is under the control of the voltage of the 3rd scanning end
Display unit is resetted by the voltage at resetting voltage end.
S33, phase III, threshold compensation unit adjust the voltage of Section Point under the control of the voltage of the 4th scanning end
Save the threshold voltage sum of the voltage and driver element for the first level terminal.
S34, fourth stage, node control unit is under the control of the voltage of the second scanning end by the voltage of reference voltage end
Export to the first node；Threshold compensation unit first node voltage and driver element output end voltage control
The lower voltage-regulation by Section Point is the electricity of the voltage, the threshold voltage of driver element and reference voltage end of the first level terminal
The press and difference with the voltage at data voltage end；Driver element the first level terminal voltage and Section Point voltage control
Under driver element output end output driving current；Display unit is under the control of the voltage of the second scanning end by driving electricity
Stream driving shows GTG.
Referring to the signal sequence view shown in Fig. 4, to picture shown in the image element circuit and Fig. 3 shown in Fig. 2
The operation principle of the driving method of plain circuit is illustrated.Wherein, with all switching transistors it is in fig. 2 grid low level
When the P-type transistor that turns on exemplified by illustrate.The first scanning end S1, the second scanning end S2, the 3rd scanning end S3 are included in Fig. 4
And the 4th scanning end S4 signal sequence state.In addition, wherein the first level terminal V1 provides high level Vdd, second electrical level end
V2 ground connection provides Vss；Exemplary, second electrical level end V2 can be grounded.Four sequential stages are provided as shown in Figure 4, including：t1
(first stage), t2 (second stage), t3 (phase III) and t4 (fourth stage).
First stage, the first scanning end S1 low levels, the second scanning end S2, the 3rd scanning end S3 and the 4th scanning end S4
High level, therefore the first transistor T1 and the 6th transistor T6 conductings, remaining transistor are turned off.Reference voltage end Vref passes through
The first transistor T1 connection first node N1, so this stage first node N1 voltage is reference voltage end Vref voltage.
Resetting voltage end Vinit is by the 6th transistor T6 connection Section Point N2, so this stage Section Point N2 voltage is multiple
The voltage of position voltage end, simultaneously because the first electric capacity C1 the first pole and the second pole connect first node N1 and Section Point respectively
N2, so the first electric capacity C1 the first pole and the voltage of the second pole are also respectively reference voltage end Vref voltage and resetting voltage
Hold Vinit voltage.Because first stage N1 and second stage N2 voltage amplitude are constant voltage, therefore first by this stage
Stage is also known as reseting stage.
Second stage, the 3rd scanning end S3 low levels, the first scanning end S1, the second scanning end S2 and the 4th scanning end S4
High level, therefore third transistor T3, the 4th transistor T4 and the 7th transistor T7 conductings, remaining transistor are turned off.Number
According to voltage end Vdata by third transistor T3 connections first node N1, first node N1 voltage by the first stage reference
Voltage end Vref voltage jump is data voltage end Vdata voltage.Again due to the 4th transistor T4 conductings, so driving is brilliant
Body pipe DTFT grid is connected with drain electrode, and driving transistor DTFT gate source voltages difference is equal to the threshold voltage of driving transistor, because
This Section Point N2 voltage jump is the first level terminal V1 voltage and driving transistor DTFT threshold voltage sum.This
Outside, because the 7th transistor T7 is turned on, thus this stage resetting voltage end Vinit also by the 7th transistor T7 by light-emitting diodes
The voltage amplitude of pipe D1 anode is resetting voltage end Vinit voltage.
It should be noted that, although Section Point N2 voltage jump can be made to be the first electricity by second stage in theory
Flush end V1 voltage and driving transistor DTFT threshold voltage sum are (i.e., it is possible to read driving transistor DTFT threshold value electricity
Pressure), but in some high-resolution application scenarios.Because the time span of second stage is too small, may result in can not
Read the threshold voltage of driving transistor.For example：When the resolution ratio of display panel is that 1440*2560, frequency are 60HZ, each picture
The driving transistor DTFT of element threshold voltage read access time is 1s/60HZ/2560=5.6us.In addition.Remove the upper of waveform
Liter, fall time, the driving transistor DTFT of each pixel threshold value read access time is less than 5us, and resolution ratio is higher, each
The driving transistor DTFT of pixel threshold voltage read access time is shorter.This stage main function is the threshold for reading driving transistor
Threshold voltage, thus this stage be also known as threshold value read the stage.
Phase III, the 4th scanning end S4 low levels, the first scanning end S1, the second scanning end S2 and the 3rd scanning end S3
High level, therefore the 5th transistor T5 conductings, remaining transistor are turned off.Due to the first transistor T1, second transistor T2 with
And third transistor T3 is turned off, so the first of the first electric capacity C1 extremely without discharge path, voltage is maintained as on last stage
Data voltage end voltage；It is similar with second stage, and because the 5th transistor T5 is turned on, so driving transistor DTFT
Grid is connected with drain electrode, and driving transistor DTFT gate source voltages difference is equal to driving transistor DTFT threshold voltage, therefore second
Node N2 voltage jump is the first level terminal V1 voltage and driving transistor DTFT threshold voltage sum.This stage is main
It act as the threshold voltage that supplement reads driving transistor DTFT, also known as threshold value supplement reading stage.
Due to adding the above-mentioned phase III in the embodiment of the present invention, therefore embodiments of the invention can increase pixel electricity
The time span of the threshold voltage of driver element is read on road, and then solution image element circuit possibly can not read the threshold value of driver element
The problem of voltage.
Fourth stage, the second scanning end S2 low levels, the first scanning end S1, the 3rd scanning end S3 and the 4th scanning end S4
High level, therefore second transistor T2 and the 8th transistor T8 conductings, remaining transistor are turned off.Reference voltage end Vref passes through
Second transistor T2 connection first nodes, therefore first node N1 voltage is changed into reference voltage end Vref voltage.While root
According to the law of conservation of charge on Section Point N2, Section Point N2 voltage is changed into the voltage of the first level terminal, driver element
Voltage and with the voltage at data voltage end the difference of threshold voltage and reference voltage end.
By TFT saturation currents formula can obtain flow into OLED electric current be：
IOLED=K (Vgs-Vth)2；
Wherein,μ、CoxFor process constant；W is driving transistor DTFT channel width；L is drive
Dynamic transistor DTFT channel length；VgsThe voltage difference of grid voltage and source voltage for driving transistor DTFT；VthDriving
Transistor DTFT threshold voltage.
Because driving transistor DTFT grid voltage is equal to Section Point N2 voltage, therefore, driving transistor DTFT
Grid voltage be：
Vg=V1+Vth+Vref-Vdata；
Wherein, V1 is the voltage of the first level terminal；Vref is the voltage of reference voltage end；Vdata is data voltage end
Voltage.
Driving transistor DTFT source voltage is：VS=V1；
So driving transistor DTFT grid voltage and the voltage difference of source voltage are：
Vgs=(V1+Vth+ Vref-Vdata)-V1=Vth+Vref-Vdata
IOLED=K (Vgs-Vth)2=K [(Vth+Vref-Vdata)-Vth]2=K (Vref-Vdata)2；
It can be seen that OLED operating current has been not driven the influence of transistor DTFT threshold voltage in above formula,
It is only relevant with the voltage at data voltage end and the voltage of reference voltage end, therefore driving transistor can be solved due to manufacturing process
And the problem of causing threshold voltage shift is operated for a long time, it is eliminated to the influence for the electric current for flowing into OLED, it is ensured that OLED's
Normal work.
Further, all transistors can also be what grid high level was turned in the image element circuit in above-described embodiment
N-type transistor, if all transistors are N-type transistor, only needs to readjust the sequential of each scanning end of image element circuit
State, for example：The clock signal terminal of t1 stages first is adjusted to high level, adjustment t1 stages second clock letter in adjustment Fig. 4
Number end is adjusted to low level, and other signals are also adjusted to the clock signal of opposite in phase.
Further, N-type transistor and P-type transistor can also be used in above-mentioned image element circuit simultaneously, now needs to protect
Needed in card image element circuit by same clock signal or voltage-controlled transistor using identical type, certain this is all
The reasonable work-around solution that those skilled in the art can make according to embodiments of the invention, therefore should be the guarantor of the present invention
Scope is protected, but in view of the making technology of transistor, because the active layer dopant material of different types of transistor is differed,
Therefore it is more beneficial for simplifying the making technology of image element circuit in image element circuit using the transistor of uniform type.
Further, shown in reference picture 5, the 4th transistor T4 and the 5th transistor in image element circuit shown in above-mentioned Fig. 2
T5 can be with common-source 51, drain electrode 52 and active layer 53；
The 4th transistor T4 transistor T5 of grid G 4 and the 5th grid G 5 is located at the both sides of active layer 53 respectively.
Exemplary, above-mentioned active layer 53 is specifically as follows polysilicon layer.
It should be noted that being located at the upside of active layer 53, the 5th transistor T5 in Fig. 5 with the 4th transistor T4 grid
Grid be located at the downside of active layer 53 exemplified by illustrate, but the embodiment of the present invention is not limited to this, in present invention implementation
4th transistor T4 grid can also be located at the downside of active layer 53 by example, and the 5th transistor T5 grid is located at active layer 53
Upside.
By making the 4th transistor T4 and the 5th transistor T5 common-sources 51, drain electrode 52 and active layer 53, Ke Yijie
The area that transistor takes display panel is saved, and then improves the aperture opening ratio of display panel.
Optionally, as shown in figure 5, the 4th transistor T4 transistor T5 of grid G 4 and the 5th grid G 5 with active layer
Projection in 53 vertical direction is overlapped.
Because active layer 53 is more sensitive to light intensity, therefore when display panel inside or extraneous pipeline have been radiated at
The 4th transistor T4 and the 5th transistor T5 can be made to produce leakage current when in active layer 53, because making the 4th crystalline substance in the embodiment of the present invention
The body pipe T4 transistor T5 of grid G 4 and the 5th grid G 5 is overlapped with the projection in the vertical direction of active layer 53, so the 4th
The grid G 5 of the transistor of grid G 4 and the 5th of transistor can mutually as photoresist layer, and then reduce the 4th transistor T4 and
5th transistor T5 leakage current, it is ensured that accurately compensated drive transistor threshold voltage.
Further, referring to shown in Fig. 6, the structure to the 4th transistor T4 and the 5th transistor T5 is carried out specifically
It is bright.
Shown in reference picture 6, the first insulating barrier GI1 is additionally provided between the 5th transistor T5 grid G 5 and active layer 53；
The second insulating barrier GI2 is additionally provided between 4th transistor T4 grid G 4 and active layer 53；4th transistor T4 grid G 4
The 3rd insulating barrier GI3 is additionally provided between source electrode 51, drain electrode 52；Source electrode 51, drain electrode 52 by through the second insulating barrier GI2 and
3rd insulating barrier GI3 through hole is contacted with active layer 53.
In due to above-described embodiment, because the 4th transistor T4 transistor T5 of grid G 4 and the 5th grid G 5 does not exist
Same barrier metal layer, therefore need to pass through respectively in the grid G 5 for the transistor T5 of grid G 4 and the 5th for making the 4th transistor T4
Patterning processes make, and can so increase the technological process of image element circuit, and then increase the manufacturing cost of image element circuit.This
Outside, due to needing to set capacitor dielectric between the first electric capacity C1 two-stage, so the first electric capacity C1 the first pole and the second pole are also needed
To be made respectively by a patterning processes.
Based on above-mentioned making technology, make the first electric capacity C1 the first pole and the second pole respectively with the 4th in the embodiment of the present invention
The transistor T4 transistor T5 of grid G 4 and the 5th grid G 5 to be formed by being made with a patterning processes.
I.e., it is possible to be that the first electric capacity C1 the first pole and the 4th transistor T4 grid G 4 pass through with a patterning processes system
Formed, the first electric capacity C1 the second pole to be formed with the 5th transistor T5 grid G 5 by being made with a patterning processes；
It can be formed for the first electric capacity C1 the second pole with the 4th transistor T4 grid G 4 by being made with a patterning processes, first
Electric capacity C1 the first pole to be formed with the 5th transistor T5 grid G 5 by being made with a patterning processes.
By making the grid G 4 and the 5th of the first electric capacity C1 the first pole and the second pole respectively with the 4th transistor T4 brilliant
Body pipe T5 grid G 5 to be formed by being made with a patterning processes, it is possible to reduce the manufacturing process of image element circuit, and then is reduced
The manufacturing cost of image element circuit.
Optionally, the output signal of the 3rd scanning end in above-described embodiment is posted for n-th grade of displacement in shift register circuit
The output signal of memory cell；The output signal of 4th scanning end is the defeated of (n+1)th grade of shifting deposit unit in shift register circuit
Go out signal；N is positive integer.
By saving independent system using the output signal of shift register circuit as the 3rd scanning end S3 and the 4th scanning end S4
Make the technique and cost of the 3rd scanning end S3 and the 4th scanning end S4 drive circuit, and then further simplify the system of image element circuit
Make process, reduce the manufacturing cost of image element circuit.
Further, embodiments of the invention additionally provide a kind of manufacture method of image element circuit, for making above-mentioned
The 4th transistor T4 and the 5th transistor T5 in one image element circuit.Specifically, shown in reference picture 7, this method includes：
S71, by first time patterning processes first grid is formed on substrate.
Specifically, a patterning processes mainly include：The processes such as film forming, gluing, exposure, development, etching, stripping.Wherein,
Film forming refers to the process of the film for forming one layer of basic material on substrate by modes such as magnetron sputtering, evaporation, chemical depositions；
Gluing refers to the process of coat photoresist on the film of the basic material of formation；Exposure refers to using mask plate to photoresist
The process that specified location is exposed；Development refers to remove the photoresist chemically reacted totally, makes to produce on glass and thinks
The process of obtained glued membrane figure；Etching refers to the mistake that the thin film corrosive for the basic material that will be covered by photoresist falls
Journey；Peel off and refer to the process of remove the photoresist film after etching.Certainly, it may also be desirable to include substrate in patterning processes clear
Wash, the process such as pattern is checked, the process and the order of each operation included to patterning processes in the embodiment of the present invention do not limit,
It is defined so that first grid can be formed.
S72, the first insulating barrier for making covering first grid.
S73, on the first insulating barrier make active layer.
S74, the second insulating barrier for making covering active layer.
S75, by second of patterning processes second grid is formed over the second dielectric.
S76, the 3rd insulating barrier for making covering second grid.
S77, by third time patterning processes source electrode and drain electrode are formed on the 3rd insulating barrier；Wherein, source electrode and drain electrode are logical
The through hole crossed through the second insulating barrier and the 3rd insulating barrier is in contact with active layer.
Wherein, first grid can be the 4th transistor T4 grid G 4 can also be the 5th transistor T5 grid G 5.
Optionally, the manufacture method of above-mentioned image element circuit also includes：
By the first pole of first time patterning processes the first electric capacity of formation, pass through second of patterning processes the first electric capacity of formation
The second pole；
Or；
By the second pole of first time patterning processes the first electric capacity of formation, pass through second of patterning processes the first electric capacity of formation
The first pole.
One embodiment of the invention provides a kind of display panel, including any image element circuit in above-described embodiment.
In addition, display panel can be：Electronic Paper, mobile phone, tablet personal computer, television set, display, notebook computer, number
Any product or part with display function such as code-phase frame, navigator.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (13)
1. a kind of image element circuit, it is characterised in that including：Node control unit, driver element, display unit, valve value compensation list
Member and reset unit；
The node control unit connects the first scanning end, the second scanning end, the 3rd scanning end, reference voltage end, data voltage
End and first node, under the control of the voltage of first scanning end or the voltage of the second scanning end by the reference
The voltage output of voltage end is to the first node, or by data electricity under the control of voltage in the 3rd scanning end
The voltage output of pressure side is to the first node；
The input of the driver element connects the first level terminal, and the control end connection Section Point of the driver element is described
Driver element be used for first level terminal voltage and the Section Point voltage control under in the driver element
Output end output driving current；
The display unit connects second electrical level end, second scanning end, the reset unit and the driver element
Output end, for showing GTG by driving current driving under the control of the voltage of second scanning end；
The threshold compensation unit connects the first node, the output end of the driver element, the 3rd scanning end, the 4th
Scanning end and Section Point, for being incited somebody to action under the control of the voltage of the 3rd scanning end or the voltage of the 4th scanning end
The voltage-regulation of the Section Point is the voltage of the first level terminal and the threshold voltage sum of the driver element, and in institute
State the voltage-regulation of the Section Point under the control of the voltage of first node and the voltage of the output end of the driver element
Voltage, the threshold voltage of the driver element and the reference voltage end voltage for first level terminal and with institute
State the difference of the voltage at data voltage end；
Reset unit connection resetting voltage end, first scanning end, the 3rd scanning end, the Section Point and
The display unit, under the control of the voltage of first scanning end by the voltage at the resetting voltage end to described
Section Point resetted and the control of voltage in the 3rd scanning end under by the voltage pair at the resetting voltage end
The display unit is resetted.
2. image element circuit according to claim 1, it is characterised in that the node control unit includes：The first transistor,
Second transistor and third transistor；
First pole of the first transistor connects the reference voltage end, the second pole connection of the first transistor described the
One node, the grid of the first transistor connects first scanning end；
First pole of the second transistor connects the reference voltage end, the second pole connection of the second transistor described the
One node, the grid of the second transistor connects second scanning end；
First pole of the third transistor connects the data voltage end, the second pole connection of the third transistor described the
One node, the grid of the third transistor connects the 3rd scanning end.
3. image element circuit according to claim 1, it is characterised in that the threshold compensation unit includes：4th transistor,
5th transistor and the first electric capacity；
First pole of the 4th transistor connects the output end of the driver element, the second pole connection of the 4th transistor
The Section Point, the grid of the 4th transistor connects the 3rd scanning end；
First pole of the 5th transistor connects the output end of the driver element, the second pole connection of the 5th transistor
The Section Point, the grid of the 5th transistor connects the 4th scanning end；
First pole of first electric capacity connects the first node, and the second pole of first electric capacity connects the second section
Point.
4. image element circuit according to claim 3, it is characterised in that the 4th transistor and the 5th transistor are total to
With source electrode, drain electrode and active layer；
The grid of 4th transistor and the grid of the 5th transistor are located at the both sides of the active layer respectively.
5. image element circuit according to claim 4, it is characterised in that the grid of the 4th transistor and the 5th crystalline substance
The grid of body pipe is overlapped with the projection in the active layer vertical direction.
6. image element circuit according to claim 4, it is characterised in that the grid of the 5th transistor and the active layer
Between be additionally provided with the first insulating barrier；The second insulation is additionally provided between the grid and the active layer of 4th transistor
Layer；The 3rd insulating barrier is additionally provided between the grid and source electrode of 4th transistor, drain electrode；The source electrode, drain electrode are by passing through
The through hole for wearing second insulating barrier and the 3rd insulating barrier is contacted with the active layer.
7. image element circuit according to claim 4, it is characterised in that the first pole of first electric capacity and the second pole difference
To be formed with the grid of the 4th transistor and the grid of the 5th transistor by being made with a patterning processes.
8. image element circuit according to claim 1, it is characterised in that the reset unit includes：6th transistor and
Seven transistors；
First pole of the 6th transistor connects the resetting voltage end, the second pole connection of the 6th transistor described the
Two nodes, the grid of the 6th transistor connects first scanning end；
First pole of the 7th transistor connects the resetting voltage end, and the second pole connection of the 7th transistor is described aobvious
Show unit, the grid of the 7th transistor connects the 3rd scanning end.
9. image element circuit according to claim 1, it is characterised in that the driver element is driving transistor, the drive
The input of moving cell is the source electrode of driving transistor, and the control end of the driver element is the grid of driving transistor, described
The output end of driver element is the drain electrode of driving transistor.
10. image element circuit according to claim 1, it is characterised in that the display unit includes：8th transistor and hair
Optical diode；
First pole of the 8th body pipe connects the output end of the driver element, the second pole connection institute of the 8th transistor
The anode of light emitting diode is stated, the grid of the 8th transistor connects second scanning end；
The negative electrode of the light emitting diode connects the second electrical level end.
11. image element circuit according to claim 1, it is characterised in that the output signal of the 3rd scanning end is displacement
The output signal of n-th grade of shifting deposit unit in register circuit；The output signal of 4th scanning end is shift register circuit
In (n+1)th grade of shifting deposit unit output signal；N is positive integer.
12. a kind of driving method of image element circuit, for driving the image element circuit described in claim any one of 1-11, its feature
It is, methods described includes：
First stage, the node control unit is under the control of the voltage of first scanning end by the reference voltage end
Voltage output is to the first node；The reset unit is resetted under the control of the voltage of first scanning end by described
The voltage of voltage end resets to the Section Point；
Second stage, the node control unit is under the control of the voltage of the 3rd scanning end by the data voltage end
Voltage output is to the first node；The threshold compensation unit is under the control of the voltage of the 3rd scanning end by described
The voltage-regulation of two nodes is the voltage of the first level terminal and the threshold voltage sum of the driver element；The reseting module exists
The display unit is resetted by the voltage at the resetting voltage end under the control of the voltage of 3rd scanning end；
Phase III, the threshold compensation unit is under the control of the voltage of the 4th scanning end by the electricity of the Section Point
Pressure is adjusted to the voltage of the first level terminal and the threshold voltage sum of the driver element；
Fourth stage, the node control unit is under the control of the voltage of second scanning end by the reference voltage end
Voltage output is to the first node；The threshold compensation unit the first node voltage and the driver element it is defeated
By voltage, the driver element of the voltage-regulation of the Section Point for first level terminal under the control for the voltage for going out end
Threshold voltage and the reference voltage end voltage and with the voltage at the data voltage end difference；The driver element
First level terminal voltage and the Section Point voltage control under the driver element output end export
Driving current；The display unit passes through driving current driving display ash under the control of the voltage of second scanning end
Rank.
13. a kind of display panel, it is characterised in that including the image element circuit described in claim any one of 1-11.
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|---|---|---|---|
| CN201710428659.0A CN107204173B (en) | 2017-06-08 | 2017-06-08 | A kind of pixel circuit and its driving method, display panel |
| EP18814246.7A EP3637405B1 (en) | 2017-06-08 | 2018-04-11 | Pixel circuit and driving method therefor, and display panel |
| US16/330,639 US10937367B2 (en) | 2017-06-08 | 2018-04-11 | Pixel circuit and driving method therefor, and display panel |
| PCT/CN2018/082632 WO2018223767A1 (en) | 2017-06-08 | 2018-04-11 | Pixel circuit and driving method therefor, and display panel |
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|---|---|---|---|
| CN201710428659.0A CN107204173B (en) | 2017-06-08 | 2017-06-08 | A kind of pixel circuit and its driving method, display panel |
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| CN107204173B CN107204173B (en) | 2019-06-28 |
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| WO2018223767A1 (en) * | 2017-06-08 | 2018-12-13 | 京东方科技集团股份有限公司 | Pixel circuit and driving method therefor, and display panel |
| TWI703547B (en) * | 2019-06-13 | 2020-09-01 | 友達光電股份有限公司 | Pixel compensation circuit |
| WO2020177563A1 (en) * | 2019-03-01 | 2020-09-10 | 京东方科技集团股份有限公司 | Pixel circuit, display substrate and display apparatus |
| CN113223458A (en) * | 2021-01-25 | 2021-08-06 | 重庆京东方显示技术有限公司 | Pixel circuit, driving method thereof, display substrate and display device |
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| WO2023050196A1 (en) * | 2021-09-29 | 2023-04-06 | 京东方科技集团股份有限公司 | Pixel driving circuit, pixel driving method and display panel |
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| CN110675822A (en) * | 2019-09-30 | 2020-01-10 | 昆山国显光电有限公司 | Pixel driving circuit and control method thereof |
| CN111477178A (en) * | 2020-05-26 | 2020-07-31 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method thereof and display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20210005143A1 (en) | 2021-01-07 |
| EP3637405B1 (en) | 2022-03-23 |
| EP3637405A1 (en) | 2020-04-15 |
| WO2018223767A1 (en) | 2018-12-13 |
| EP3637405A4 (en) | 2021-03-03 |
| US10937367B2 (en) | 2021-03-02 |
| CN107204173B (en) | 2019-06-28 |
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